Credit Facility	12 Months Ended
Dec. 31, 2017
Credit Facility
Credit Facility	10. Credit Facility We have entered into a Credit Agreement (the "Credit Agreement") and related agreements, as amended, with Bank of America, N.A. acting as agent for lenders named therein, including Bank of America, N.A., Silicon Valley Bank, and Citizens Bank, N.A. (the "Lenders"), for a secured credit facility in the form of a revolving line of credit of up to $69,750, which was increased from $46,500 in February 2016, with an option to increase the available amount to $86,500 upon the satisfaction of certain conditions (the "Revolving Line of Credit") and a term loan of $3,500 (the "Term Loan" and together with the Revolving Line of Credit, the "Credit Facility"). We may use borrowings under the credit facility for general working capital and corporate purposes. In general, amounts borrowed under the Credit Facility are secured by a lien against all of our assets, with certain exclusions. As of December 31, 2017 and 2016, $0 and $15,000, respectively, was outstanding under the Revolving Line of Credit. The Revolving Line of Credit requires quarterly payments of interest and matures on November 21, 2018, but may be prepaid in whole or part at any time. Amounts borrowed under the Revolving Line of Credit and Term Loan will bear, at the Company's election, a variable interest at LIBOR plus 2.5% - 3.5% or Lender's Prime Rate plus 1.5% - 2.5% per year and we will pay a fee of 0.375% - 0.5% per year on any unused portion of the Revolving Line of Credit. As of December 31, 2017 and 2016, $875 and $1,969, respectively, was outstanding under the Term Loan. The Term Loan requires quarterly payments of interest and principal, amortizing fully over the four-year-term such that it is repaid in full on the maturity date of November 21, 2018, but may be prepaid in whole or part at any time. Repayment of amounts borrowed under the Credit Facility may be accelerated in the event that we are in violation of the representations, warranties and covenants made in the Credit Agreement, including certain financial covenants set forth therein, and under other specified default events including, but not limited to, non-payment or inability to pay debt, breach of cross default provisions, insolvency provisions, and change of control. The Company is subject to customary financial and non-financial covenants, including a minimum quarterly consolidated leverage ratio, a maximum quarterly consolidated fixed charge coverage ratio, and monthly liquidity minimums. The Company was in compliance with all financial covenants as of December 31, 2017. The Company incurred $124 of additional debt issuance costs in February 2016 and $62 of additional debt issuance costs in August 2015. Debt issuance costs are amortized on a straight-line basis over the term of the Credit Facility. Amortization expense related to debt issuance costs are included in interest and other expense in the accompanying consolidated statements of operations for the years ended December 31, 2017, 2016, and 2015. Amortization and interest expense capitalized amounted to $773, $823, and $648 for the years ended December 31, 2017, 2016, and 2015, respectively. Amortization and interest expense recorded amounted to $187 and $309 for the years ended December 31, 2017 and 2016, respectively. Interest rates for our Credit Facility for the year ended December 31, 2017 ranged from 3.5% to 3.8%, and the interest rate was 3.8% at December 31, 2017. As of December 31, 2017 and 2016, the carrying amount reflected in the accompanying consolidated balance sheets for the current portion of long-term debt and long-term debt approximates fair value (Level 2) based on the variable nature of the interest rates and lack of significant change in our credit risk.

10. Credit Facility

We have entered into a Credit Agreement (the "Credit Agreement") and related agreements, as amended, with Bank of America, N.A. acting as agent for lenders named therein, including Bank of America, N.A., Silicon Valley Bank, and Citizens Bank, N.A. (the "Lenders"), for a secured credit facility in the form of a revolving line of credit of up to $69,750, which was increased from $46,500 in February 2016, with an option to increase the available amount to $86,500 upon the satisfaction of certain conditions (the "Revolving Line of Credit") and a term loan of $3,500 (the "Term Loan" and together with the Revolving Line of Credit, the "Credit Facility"). We may use borrowings under the credit facility for general working capital and corporate purposes. In general, amounts borrowed under the Credit Facility are secured by a lien against all of our assets, with certain exclusions.

As of December 31, 2017 and 2016, $0 and $15,000, respectively, was outstanding under the Revolving Line of Credit. The Revolving Line of Credit requires quarterly payments of interest and matures on November 21, 2018, but may be prepaid in whole or part at any time. Amounts borrowed under the Revolving Line of Credit and Term Loan will bear, at the Company's election, a variable interest at LIBOR plus 2.5% - 3.5% or Lender's Prime Rate plus 1.5% - 2.5% per year and we will pay a fee of 0.375% - 0.5% per year on any unused portion of the Revolving Line of Credit. As of December 31, 2017 and 2016, $875 and $1,969, respectively, was outstanding under the Term Loan. The Term Loan requires quarterly payments of interest and principal, amortizing fully over the four-year-term such that it is repaid in full on the maturity date of November 21, 2018, but may be prepaid in whole or part at any time. Repayment of amounts borrowed under the Credit Facility may be accelerated in the event that we are in violation of the representations, warranties and covenants made in the Credit Agreement, including certain financial covenants set forth therein, and under other specified default events including, but not limited to, non-payment or inability to pay debt, breach of cross default provisions, insolvency provisions, and change of control.

The Company is subject to customary financial and non-financial covenants, including a minimum quarterly consolidated leverage ratio, a maximum quarterly consolidated fixed charge coverage ratio, and monthly liquidity minimums. The Company was in compliance with all financial covenants as of December 31, 2017.

The Company incurred $124 of additional debt issuance costs in February 2016 and $62 of additional debt issuance costs in August 2015. Debt issuance costs are amortized on a straight-line basis over the term of the Credit Facility. Amortization expense related to debt issuance costs are included in interest and other expense in the accompanying consolidated statements of operations for the years ended December 31, 2017, 2016, and 2015. Amortization and interest expense capitalized amounted to $773, $823, and $648 for the years ended December 31, 2017, 2016, and 2015, respectively. Amortization and interest expense recorded amounted to $187 and $309 for the years ended December 31, 2017 and 2016, respectively. Interest rates for our Credit Facility for the year ended December 31, 2017 ranged from 3.5% to 3.8%, and the interest rate was 3.8% at December 31, 2017.

As of December 31, 2017 and 2016, the carrying amount reflected in the accompanying consolidated balance sheets for the current portion of long-term debt and long-term debt approximates fair value (Level 2) based on the variable nature of the interest rates and lack of significant change in our credit risk.